[{“Name”:“4.0”,“GroupName”:“PHP 4.x”},{“Name”:“4.1”,“GroupName”:“PHP 4.x”},{“Name”:“4.2”,“GroupName”:“PHP 4.x”},{“Name”:“4.3”,“GroupName”:“PHP 4.x”},{“Name”:“5.0”,“GroupName”:“PHP 5.x”},{“Name”:“4.4”,“GroupName”:“PHP 4.x”},{“Name”:“5.1”,“GroupName”:“PHP 5.x”},{“Name”:“5.2”,“GroupName”:“PHP 5.x”},{“Name”:“5.3”,“GroupName”:“PHP 5.x”},{“Name”:“5.4”,“GroupName”:“PHP 5.x”},{“Name”:“5.5”,“GroupName”:“PHP 5.x”},{“Name”:“5.6”,“GroupName”:“PHP 5.x”},{“Name”:“7.0”,“GroupName”:“PHP 7.x”},{“Name”:“7.1”,“GroupName”:“PHP 7.x”}]
Classes and Objects are used to to make your code more efficient and less repetitive by grouping similar tasks.
A class is used to define the actions and data structure used to build objects. The objects are then built using this predefined structure.
class <ClassName> [ extends <ParentClassName> ] [ implements <Interface1> [, <Interface2>, ... ] { }
// Class declarationinterface <InterfaceName> [ extends <ParentInterface1> [, <ParentInterface2>, ...] ] { }
// Interface declarationuse <Trait1> [, <Trait2>, ...]
; // Use traits[ public | protected | private ] [ static ] $<varName>;
// Attribute declarationconst <CONST_NAME>;
// Constant declaration[ public | protected | private ] [ static ] function <methodName>([args...]) { }
// Method declarationClasses may have properties, constants and methods.
class Foo {
private $foo = 'foo'; // OK
private $baz = array(); // OK
private $bar = new Bar(); // Error!
}
Interfaces cannot have properties, but may have constants and methods.